Tttkntetg wood tapeeiwg



VVYLLYS AVERY, OF SALISBURY, NEWYORK.

TURNING W0 OD TAPERING.

Specification of Letters Patent No. 3,618, dated June 5, 18%.

To all *Loli-0m 'it may conce/ra Be it known `that I, `VYLLrs AVERY, of Salisbury, `in the county of Herkimer and State of New York, have invented a new and useful Method of. Turning Timber Tapering by Passing it Through a Revolving `Hollow Mandrel; and I do hereby declare'that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings of the same, making part of this specification.

Figure l` is a perspective view of the machine. Fig; Q'is anend view. Fig. 3 is a longitudinal section. F ig. d is a section of the cutter or chisel at the mouth of the mandrel. Figf is a section vof the `movable chisel.

This machine consists of a suitable frame or bench A, upon which are fastened two pillars B B in which a hollow mandrel C turns by means of a pulley D on said mandrel around which is passed a strap E leading' to the driving orpropelling power.

F represents the chisel which cuts the sticks to the size of the bore of the mandrel or to a less size if necessary.

F in Fig. a represents an end view of said chisel.

G represents the chisel which is moved to vary the size ofthe stick or give it a taper from one end to the other end as the stick enters the mandrel. Gr in Fig. 5 is an end view of said chisel. On the edge it should be nearly or quite Hat for a short distance in the middle. This chisel is made fast at the outer end by screws to an arm g on the mandrel for that purpose and made elas- .tic or springy so as to yield or be raised by slidingthe wedge H under it close to the mandrel.

I is a sliding ring made to slide freely back and forth over t-he mandrel, the plane of the ring or vertical circular plate being kept at right angles withthe axis of the mandrel by the rods H, J, which are made fast to the flange or circular plate and slide through the pulley to the left and right, the' upper one H being shaped like a wedge and when moved to the right acts as a wedge to raise the chisel G, the lower rod J being kept steady by passing through a knob II attached to the mandrel for that purpose. The aforesaid circular plate, ring or flange I is made of metal and turned perfectly smooth, the outer edge of which plate runs in a groove in the end cf the arm L which is inserted into the rock shaft M. Another arm M is fitted .into the same rock shaft M having a `pin P in its lower end which lays on the. top of the inclined sliding gage rod P being held down thereon by a spring S or weight attached to the carriage.

The cutter F atl the open or dishfshaped endof the mandrel is made in the usual manner and secured tothe mandrel by screws passed through oblong slots in the shank of the cutter into the mandrel.

The movablecutter G is attached'to an armf/ (projected from the circumference of the mandrel) by screws inserted intosaid arm near its outer extremity the said cutter` being adjustable on the Shanks of said screws by mea-ns of oblong slots in the cutter through which the screws pass. Both cutters are placed in openings Q Q in the circumference of the revolving mandrel through which openings the chips pass.

A cylindrical guide T (forming part of the carriage T) is placed in the mandrel having a longitudinal movement back and forth, within the mandrel for supporting and guiding' one end of the stick of timber to be cut and shaped tapering, said portion of the carriage being made concave at the end neXt the cutter, into which concave end, one end of the stick of timber to be shaped is inserted, the other end of this portion of the carriage is inserted into an upright piece T2 of the carriage forming its rear end.

The sides of the aforesaid carriage consists of two horizontal parallel rails A framed together having tongues t on the sides thereof which slide horizontally back and forth in corresponding grooves i; made in the inner sides of the parallel rails of the bench or frame.

A gage rod R for determining the taper to be given to the piece of timber inserted into the mandrel is arranged and secured longitudinally in the carriage at any required angle with a horizontal plane variable at pleasure and movable with the carriage for gradually moving the cutters farther from the center of the stick of timber being tapered as it enters the mandrelfthus producing the taper required-said gage rod as it moves toward the rear end of the bench, causing the arm N to rise in the arc of a circle and the arm L at the same time `to move toward the cutter carrying with the said arm the circular plate I and size is introduced into the mandrel C the chisel F will cut it to a diameter as much less than the diameter of the bore of the mandrel as the cutting edge extends into the mandrel; and when the stick arrives at the vmovable cutter G its diameter will be still further reduced according to the position of said movable cutter. hen the stick reaches the round part T of the carriage in the mandrel the whole carriage with the inclined gage rod thereon is caused to recede and the stick of timber continuing to enter the mandrel and the carriage to recede the inclined gage R acts on the pin P resting upon it, causing the end of the armiN to rise and the shaft M to turn which acts upon the other arm L and this upon the ring I and the ring I upon the wedge H which passes between the spring cutter G and the arm g to which it is attached, by which the position of the cutting edge of the chisel G is changed and consequently the form of the piece of timber to be shaped in contact therewith.

`What I claim as my invention and which l desire torsecure by Letters Patent, is-

The mode of moving the second cutter'G, causing it to recede from the center of the hollow mandrel, to cut pieces of wood taper'- ing, by the combination of the wedge H# plate I arms L and rock shaft M-carriage T, and gage rod R arranged and operated in the manner and for the purpose set forth, or in any other mode substantially the same, by which analogous results are produced.

VYLLYS AVERY.

lVitnesses E. W.` SMITH,

BENJAMIN D. BRAoKn'r'r. 

